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Add a testcase where GVNPRE what getting confused by a loop. 

llvm-svn: 37594
This commit is contained in:
Owen Anderson 2007-06-15 17:54:05 +00:00
parent cd5f5e3ecd
commit ad9743225e
1 changed files with 22 additions and 0 deletions
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llvm/test/Transforms/GVNPRE/2007-06-15-Looping.ll Normal file
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; RUN: llvm-as < %s | opt -gvnpre | llvm-dis
define fastcc void @compute_max_score_1() {
entry:
%tmp7 = sub i32 0, 0 ; <i32> [#uses=0]
br label %bb
bb: ; preds = %bb212, %entry
%indvar29 = phi i32 [ 0, %entry ], [ %indvar.next30, %bb212 ] ; <i32> [#uses=2]
%j.01.0 = sub i32 %indvar29, 0 ; <i32> [#uses=0]
br label %cond_next166
cond_next166: ; preds = %cond_next166, %bb
br i1 false, label %bb212, label %cond_next166
bb212: ; preds = %cond_next166
%indvar.next30 = add i32 %indvar29, 1 ; <i32> [#uses=1]
br i1 false, label %return, label %bb
return: ; preds = %bb212
ret void
}